Work-feeding mechanism for sewing-machines.



P. SIOSTROM.

WORK FEEDING MECHANISM FOR SEWING MACHINES. 'APPLICATION FILED MAY la,Y 1915.

1,1 90,201. l Patented July 4, 1916.

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P. SJOSTROM.

v WORK FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED MAYls. |915.

1,190,201. Patented Jul ,1916.

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\SIOSTROM.

WORK FEEDING MECHANISM FOR SEWING MACHINES.

APPLICATION FILED MAY I3. 1915.

Patented July 4, 1916.

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P. SIOSTROIVI.

WORK FEEDING MECHANISM FOR SEWI'NG MACHINES.

APPLICATION FILED MAY I3. 1915.

Patented July 4, 1916.

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PETER sJosTRoM, 0E MAPLEwooD, MAssACHusETTs, vnssierNoR `TovICToE sHoE MACHINERY COMPANY, or isosToN, MASSACHUSETTS, `aConron'n'iioN or MASSACHUSETTS.

WORK-EEEDING MECHANisM Een SEWING-MACHINES.

Specification ofLet-teis Patent.

Patented July 4, 191e.

Original application filed February 17, 1915, Serial No. 9,465'. Divided and this application led May13,

1915. serial No. 28,497.

To all whom t may concern:

Be it known that I, PETER SJosTaoM, a subject of the King of Sweden, and a resident of Maplewood, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in fork-Feeding Mechanisms for Sewing-Machines, of which the following isv 1915, and numbered 9,465, and to which reference maybe made for the complete operation of the entire sewing machine.

The present invention consists in certain novel features of construction and arrangement of parts which will be fully understood by reference to the description of the drawings and to the claims hereinafter given.

Of the drawings: Figure 1 represents a side elevation of a sewing machine embodying the principles of the present invention. Fig. 2 represents an elevation ofthe left end of the same. Fig. 3 represents a vertical section ofthe same. Fig. 4 vrepresents a sectional detail showing the presser foot operating mechanism. Fig. 5.' represents a front elevation of a portion of the saine, parts thereof being shown in section, and Fig. 6 represents a horizontal section thereof, the cutting plane being on line 6-6 on' Fig. 3.

Similar' vcharacters designate like parts throughout the several figures of the drawings.

' of the bolt 26 to the gear segment 27, the

hub 28 of which isinounted upon the stud the work.

21 about the axis of which it is adapted to of a circle from the dotted position a to the v Y dotted position as indicated in Fig. 1 of the drawings..vk The shaft 30 has loosely mounted thereon a disk member 31 having Y formed thereon radial shoulders 32-33 which are adapted to be engaged by a pin 34 extending laterally from the gear 29. This pin 34, during the oscillation of the gear 29, will impart movement to the disk 31 when contacting with .either of the shoulders 32-33, while permitting said disk to remain at a standstill at the beginning of the movement of said pin 34 in either direction, that is, while traveling from the shoulder 32 to the shoulder` 33 or vice versa. v

The disk 31 is provided with a cam projection 35adapted to engage lthe truck 36 on a lever 37 pivoted at 38 tothe frame 23, the opposite end of said lever 37 being provided with a bearing member 39 adapted to engage the awl carrier 40 when it is desired to feed The awl carrier 40 is provided with the usual curved awl 41. The truck 36 is retained normally in contact with the cam `35 bythe spring 37x which forces the front end of the lever 37 outwardly, this outward movement being limited by the stop pin 38".

The bearing member39 consists of afscrew threaded to the end ofthe lever 37 and held in adjusted position by means of the clamping nut 42. The awl carrier 40 is mounted upon a pin 43 extending through a boss 44 formed upon the side of the needle carrier 45, said kpin being prevented from rotating by means of thev clamping screw 46. The needle carrier 45 is provided with the usual Curved barbedxneedle 47 and oseillates about the stud 47X fixed in theframe 23. The needle carrier 45 is provided in its outer face with a depression in which is mounted a spring 48 normally tending to force the soV jas

49 has a cylindrical shank 53 extendingV through and beyond said tubular member 50, the outer end being threaded as at 54, and having mounted thereon an adjusting nut 55, by which the position of the stop member 49 may be determined to regulate the amount of separation of the awl carrier and needle carrier. The stop member 49 is forced outwardly by means of a spring 56, the tension of which is greater than the spring 48, so that under ordinary conditions when the awl carrier is moved away from the needle carrier by the spring 48 its outward movement will be determined Aby the member 49, the spring 56 only yielding when under abnormal conditions to prevent damage to the machine. The spring 56 also serves the purpose of retaining the member 49 in its adjusted position with the hub of the adjusting nut in contact with the clamping nut 57 of the tubular member 50; The tubular member 50 forms a stud upon which is mounted the presser foot carrier 58 having secured thereto the presser foot 59.

The needle carrier 45 is provided with an arm 45 to the outer end of which is pivoted one end of a` connector 106x, the opposite end of which is pivoted at 105X to one face of the cam disk 105 secured to the oscillating sha-ft 30. The oscillatory movement of the shaft 30 will be imparted to the needle carrier 45 and through the latter to the awl carrier 40. The cam 105 is provided with a cam path 107 in which is positioned a truck or roll 108 on the end of one arm 109 of a lever 113 pivoted at 110 to the frame 23. This lever 113 is provided with another arm 114 in the upper end of which is mounted a thread placing device 115 provided with two lingers 116 which receive the thread T and place it on the barb of the needle 47 when it is about to move upwardly through the work. The fingers 116 are moved into a substantially horizontal position at a predetermined time by the blade 125 secured to the needle carrier 45, this blade coacting with an arm 117 secured to the shank 114X of the member 115. The forward movement of the member 115 is effected by the cam path 107. A connector 103 is pivoted at 104 to the face of the cam 105 and its opposite end is pivotally connected at 102 to the takeup lever 98 pivoted at 101 to the frame 23.

A wax pot 89 is positioned in the base of the frame 23 and immersed in the wax therein is aroller 94X about which the thread T passes through the wax from the source of supply. This thread T passes from the wax pot 89 through the stripper 95 to a roller 96 secured to the frame 23 from which it passes to a roll 97 on the takeup lever 98. The thread T then passes over the roll 100 to the roller 99 on the end of the takeup lever 98 and thence over the-roller 121 to the thread placing mechanism.

As the operation of the thread takeup mechanism and the thread placing mechanism form no part of the present invention and are both fully described in the original application hereinbefore referred to, it is deemed that further description thereof is unnecessary in this application. The shuttle 145 is provided with a; stud 143 adapted to oscillate in the frame 23, said stud having secured to its outer end a pinion 142 the teeth of which mesh with the gear segment 141 formed upon one end 140 of a lever 138 pivoted at 139 to the frame 23. This lever 138 is provided with a curved arm 137 having a cam recess 136 therein in which is positioned a roll 135 mounted upon the end of an arm 134 secured to and oscillating with the oscillating shaft 30. The cam recess 136 is so shaped that during the oscillation of the arm 104 the truck 135 will impart the necessary movements to the shuttle including the required standstill, all as fully described in the original application hereinbefore referred to.

The presser foot 59 is securedto a carrier 58. The carrier 58 has an upward extension 60 formed thereon by which the presser foot may be lifted from the work. The carrier 58 also has a rearward extension 61 to which is secured a ratchet plate 62 having a plurality of ratchet teeth 63 formed thereon in an arc of a circle concentric with the pivot 64 of a pawl lever 65, the outer end of which has articulated thereto, at 66, a pawl 67 normally engaging the ratchet teeth 63. The pawl 67 is preferably secured by means of a pin 69 to a. lever 68, also pivoted at 66. The lever 68 has secured thereto one end of a spring 70, the opposite end of which is secured to a Xed pin 71, the tension of said spring normally retaining the pawl 67 in engagement with the ratchet teeth 63 and the presser foot 59 in contact with the work. The forward end of the lever 68 is positioned within the forked end 72 of a hand lever 73 pivoted at 64 to the presser foot carrier 58, said pivot 64 consisting of a stud extending through the lever 7 3 and the presser foot carrier 58 and being threaded to the lever 65. The lever 68 is also provided on its under side with a cam projection 74 adapted to be engaged at predetermined times by a cam projection 75, uponis secured one end of a spring 8O the oppo-- site end of which is secured to a member 81` pivoted at 82 to the' rear of the frame 23; The member 8l is also provided with a lateral cylindrical projection 83 eXten'ding over the lateral extension 7 9` which extension is provided with an upwardly extending flange 84 provided with aV perforation through which the thread T passes from the source of supply betwecn`= the projection 83 andthe upper surface of the extension 79, then downwardly through' a hole in" said extension and upwardly through another hole therein over said projection 83 and downwardly through a' hole'v in saideX- tension along the under face of said eXtension 7 9 to an eye 88 and then downwardly into the wax pot 89, all as fully shown and described in the original application hereinbefore referred to, and to which reference may be made for the complete operation o'f the presser foot mechanism.

In the operation of the machine the oscillation of the segment 27 'will impart oscillatory movement to the gear 29, and through this gear 29 to the main driving shaft 30. The pin 34 on the gear 29 will coact with the shoulders 32 and 33 of the cam member 35 and move this `cam member 35 at the end of the movement of the pin 34 in either direction. The movement ofthe cam 35 will operate the lever 37 moving it about its pivot 38 and cause the bearing member 39 to force the awl carrier 40 toward the, needle carrier 45, the awl 41 at this time being in the work and causing the work to be fed so that 4the necessary instrumentalities for the formation of the stitch, but as these. devices form no part of the present inventlon they are not herein described.

While there is no novelty in providing an f oscillating needle carrier and pivoting thereto an awl carrier which oscillates with the needle carrier and has an independent movement about its pivot to feed the work,

this oscillation o f theneedle' 'carrier has al- I ways beencffected byal revoluble cam mountedon a rotary shaft. It is new, however, to effect this oscillationA ofthe needle' carrier by means of an oscillating cam as herein shown and described, and to provide a standstill of, said 'cam at the end. of its movement in either direction. It is 4also new to providev an'l adjustableV `spring controlled member to limitthe outward movementl of theawl carrier. l

Itisv believedthat the operationl and many advantages of this machine' will be fullyl understood from the foregoing description.

Having' vthus described my invention, I cla-im: j

l. In a machine of the class described, the combination of a stitch forming mechanism; an oscillating member for actuating said mechanism; `means for oscillating said member a cam on and oscillating with said' mem-l ber; and a work feeding device independentfof but operable by said cam; y

2f In a machine of the class described, the combination of astitch'forming mechanism; a member adapted to move alternately in opposite directions and actuate said mechanism; means for imparting motion thereto; a cam onV and' oscillating with vsaid member; and a work feeding device independent of but operable by said cam. 4 Y

In a machine of the' class described, the combination of a' `stitch forming mechanism; a member adapted to move alternately in opposite directions and actuate said mechanism; means for imparting motion thereto; a face ,cam on and oscillating with said member; a. work feeding device independent of but operable by said cam; and yielding means for retaining said work feeding device in Contact with said cam.

4. In a machine of the class described, the combination of .a stitch forming mechanism; an oscillating member for actuating said mechanism; a work feeding device; a member loosely mounted on said oscillating member and adapted to oscillate therewith during a portion of its movement; and means for actuating said work feeding device by said loosely mounted member.

5. In a machine of the class described, the combination of a stitch forming mechanism; an oscillating member for actuating said mechanism; a work feeding device; amember for actuating said device; and means actuated by said oscillating member for oscillating said work-feeding-device-actuating member having provision for effecting a standstill thereof at the end of the oscillatory movement in either direction of said oscillating member.

6. In a machine of the class described, the

- combination of a stitch forming mechanism;

a work feeding device; an oscillating shaft having a disk at one end provided with two lli radial shoulders; means for actuating said work feeding device by the oscillation of said shaft; an oscillating gear having a projection adapted to alternately engage a shoulder to effect movement of said disk in opposite directions; and a gear segment meshing with said gear and adapted to impart an oscillatory movement thereto.

7. In a machine of the class described, the combination of a Xed nonrevoluble stud; a needle carrier mounted thereon and adapted to be oscillated about the aXis thereof; a needle carried thereby; an awl carrier; an awl carried thereby; a spring for separating said carriers; a pivoted cam controlled lever for moving said awl carrier toward said needle carrier; an adjustable bearing member in the end of said lever; and a spring controlled member coacting directly with and limiting the outward movement of said awl carrier.

8. In a machine of the class described, the combination of a fixed stud; a needle carrier mounted thereon and adapted to be oscillated about the axis thereof; a needle carried thereby; an awl carrier; an awl carried thereby; a spring for separating said carriers; a pivoted cam controlled lever for moving said awl carrier toward said needle carrier; an adjustable bearing member in the end of said lever; a tubular stud provided with a diametral slot; a member mounted therein and provided with projections in said slot and having a threaded shank; a spring surrounding said shank and oples of thin patent may be obtained for tending to move said member outwardly; and a nut on said shank for adjusting the position of said limiting member.

9. In a machine of the class described, the combination of a stitch forming mechanism; an oscillating shaft; means for actuating said stitch forming mechanism by the oscillation of saidshaft; a gear secured to said shaft having a lateral projection; a member loosely mounted on said shaft adapted to be intermittently engaged by said projection; and work feeding mechanism operable by 'said loosely mounted member.

l0. Ina machine of the class described, the combination of a fixed non-revoluble stud; a needle carrier mounted thereon and adapted to be oscillated about the axis thereof; a needle carried thereby; an awl carrier; an awl carried thereby; a spring for separating said carriers; a pivoted lever for moving said awl carrier toward the needle carrier; an oscillating cam for actuating said lever; a member coacting directly with the outer face of said awl carrier and limiting the outward movement thereof; means for adjusting the position of said limiting member; and yielding means for retaining said limiting member in adjusted position Signed by me at l Post Oflice Sq.; Boston, Mass.7 this 10th day of May; 1915.

PETER SJOSTROM.

Vitnesses :v

WALLER E. LOMBARD, NATHAN C. LOMBARD.

ve cents each, by addressing the Commiionr ef Entente. Weisman, D. C. 

